module main import gx import gg import time import glfw import math const ( size = 700 scale = 50.0 pi = math.pi ) struct Context { gg &gg.GG } fn main() { glfw.init_glfw() gconfig := gg.Cfg { width: size height: size use_ortho: true create_window: true window_title: 'Graph builder' always_on_top: true } ctx := &Context{ gg: gg.new_context(gconfig) } ctx.gg.window.set_user_ptr( ctx ) go update() // update the scene in the background in case the window isn't focused for { if ctx.gg.window.should_close() { break } gg.clear(gx.white) ctx.draw() ctx.gg.render() } } [live] fn (ctx &Context) draw() { center := f64(size / 2) ctx.gg.draw_line(0, center, size, center, gx.gray) // x axis ctx.gg.draw_line(center, 0, center, size, gx.gray) // y axis atime := f64( time.ticks() / 10 ) stime := math.sin( 2.0 * pi * f64( time.ticks() % 6000 ) / 6000 ) mut y := 0.0 y = 1.0 for x := -10.0; x <= 10.0; x += 0.02 { //y = x*x + 2 y = x*x + stime*stime //y = stime //y = stime * x y = stime*1.0*math.sin(x + stime+atime/50) * x //y = (stime * x) * x + stime //y = (x + 3) * (x + 3) / stime + stime*2.5 //y = math.sqrt(30.0 - x * x) * stime //y -= (stime-0.5) + stime ctx.gg.draw_rect(center + x * scale, center - y * scale, 1, 1, gx.blue) ctx.gg.draw_rect(center + x * scale, center + y * scale, 1, 1, gx.red) } } fn update() { for { gg.post_empty_event() time.sleep_ms(16) // 60 fps } }